Preston, Ralph C <br/><br/>
Teaching social studies in the elementary school / 
by Ralph C Preston 
 - 3rd ed. 
 - New York :  Holt Rinehart,  1968. 
 - 370p. : 
<br/><br/><label>Subjects--Topical Terms: </label><br/>elementary school 
<br/><br/><label>Dewey Class. No.: </label>372.83  / PRE.T